Driver or picker apparatus for looms



Magyar Mill/tim `V Nov. 23 1926.

G. F'` GIEHLER DRIVER 0R PICKER APPARATUS Fon Locus Filed June 6, 1925 2Sheets-Sheet 1 I l f di VI f Ei: 3

@FWS

Nov. 23 1926. G. F.v GIEHLER InIvER on PICKER APMRATUS Filed June 6 1925FOR LOOMS 2 Sheets-Sheet 2 Wit/M6665' .Patented Nov. 423, 192,6.

UNITED STATES'PATENT OFFICE.

GUSTAV FRIEDRICH GIEHLER, 0F CHEMNITZ, GERMANY.

Dmvnn onrrcxnn APPARATUS ron Looms. Y,

Application filed .Tune 6 1925, Serial No. 35,393, and in Germany August26, 1924.

As is known, the driver or picker devices in looms irrespectively ofwhether they are driven by over-beaters, under-beaters, spring power orthe like, present a number of disadvantages, such as considerableconsumption of power, vibration of the loom, heavy construction,excessive wear, and -disturbances of working resulting from wear of theparts and stretching of thelbelts. In order to remove' thesedisadvantages a start has been' made by omitting the picker' altogetherand exerting a driving action directly on the shuttle. For this purposecontinuously rotating discsare utilized which from time to time, arebrought into contactwith the shuttle. The latter must then however be ofa special form, such that the discs can come into contact withprojecting ledges on the shuttle body. The devices in question arecomplicated and have not been adopted to any extent in practice.

The present invention also makes use of continuously rotatingfrictiondiscs, but does not let them act directly on the implement (shuttle),but the discs which are utilized singly or in numbers, act upon a slidecarryin a driver or picker device so that the driver device in its turndrives the shuttle which may be constructed in the usual way.

Slide-block. driving is known in itself. the known' method however theslide acts directly or is itself directly subjected to the beatingdevice. The vibrations are not eliminated. It is a question primarilyonlyof a driving device such as those mentioned at the beginning withthe defects there set forth. According lto the invention, however, theslide is only an intermediate member for uniting the advantages of thefriction-disc drivewith the movement by drivers or'pickers whichis'advantageous for the implement, that is to say, for the purpose i ofstill exerting a powerful blow on the implement without causingvibration of the loom mechanism.

v Thedevice is very simple and` guarantees a surel result. It may beemployed not only for driving the shuttles but also for driving all theother implements to which a reciprocating movement has to bel impartedin weaving, such as skewers and the like, wherein all these implementscan retain their c ustomary form.` h

The slide is accelerated gradually and therefore without shock from theposition of restf'by the friction discs rotatingvat a ,has to be thrownby the take place at a comparatively high velocity, time is availablefor its substantially more return movement, so that this can be eXecutedcomparatively slowly. According t0l the invention, for the returnmovement, another friction disc, likewise continuously running, isutilized, which is rotated in the opposite direction to the forwarddriving disc and more slowly, and comes into engagement, owing to areversing controL. after the forward driving disc has been moved awayVfrom the slide, so that` the latter cannot even by accident come intocontact with the retracted slide.

In the accompanying drawings one constructional example of the inventionis illustrated.

Figure l shows a partial side elevation,

Figure 2 a partial cross section on the line -m in Figure 1 on a largerscale;

Figure 3 an end view, and

Figures 4 and 5 altered positions of the essential parts.

According to Figure v1, the shuttle, not shown, rests in a supportconsisting` of two guiding rails 1, 1, secured to the lathe or sley 2vertically one above the other. It driver-3, which is supported underthe action of the spring 4 in the holder 5, in a manner known in itself.The holder 5 is mounted on the slide 6, which rests in a box-shapedguide 7 secured to the lathe beam 8.

0n the lathe beam 8 is also supported a bell-crank lever 9 oscillatableabout the pivot 10, onearm of friction discs 11. They may engage withtheir wedge-shaped rims in correspondingly wedge-shaped grooves orkeyways 12 in the slide 6 (Figure 2). The bell-crank lever 9 furthermorecarries two smaller discs 13, with wedge-shaped edges, which can en gagein the keyways 12 of the slide. The

discs 11 and 13, projectingthrough slots in said lever carrying twobell-crank lever or the like,

direction indicated by t with the guide 7, are connected with oneanother` by a crossed belt 14. On the common shaft of the two discs 11there acts a quarter-twist belt 15 the driving pulley of which can beset in rapid rotation by an electric motor or other drive. To anextension 9 of the 9 there is attached a controlling means in the formof a rod,` a cord of wire 17. If the controlling means 17 is to act onlyby a downward pull, provision must be made by means of acounter-balancing weight or spring for the rocking movement of thebell-crank lever 9 in the other direction. v

In Figure 5 is to be found the brake not shown in Figure 1, located, inthe direction of the drawing at an appropriatedistance to the left ofthe pulle 11. This brake consists of a stationary b ook 18 and a movableblock 19. On the block 19 there acts a controlling means 2O consistingof a cord while theblock 19 is normally held in the braking position bymeans of a spring or the like.

In the case of the right-hand shuttle drive illustrated, the two-folddisc 11 illustrated enters, owing to the movement of the arm -94 or ofthe controllin means 17 in the e arrow, intothe slide grooves 12, and inconsequence of its rapid rotation accelerates the slide towards theleft, the driver 3 tle vout of its support-1; 'The slide runs in betweenthe brake blocks 18, 19 (Figure 5) and is thereby brought to restwithout hook. With the openin of the brake by he controlling means 20 te bell-crank lever 9 is so rocked that its discs 13 engage in thekeyways 12 of thel slidev and now r'eturn it wlth a slower movement into'the position according to Figure 1, in which the returning'shuttle istaken up, whereupon the movement is repeated.

The friction discs acting on the slide may lof .course be constructedotherwise than as lllustrated, as is known in` itself. Instead of thetwodiscs one' or, more may be employed; and the discs may be constructedgrooved rims, in which case the slide would have to Abe provided withfriction grooves. A construction is also-conceivable 1n which frictiondiscsA or 'frictionrollers act on the slide from both sides, the slidethus runnin between the friction discs.`

What I c aim is 1. Apparatus for reciprocating the implements used forweaving -in looms, comprising continuously rotating frictiomdiscs, aslide adapted to `be reciprocated by said discs, and a'driving stop onsaid slide, said driving stop being adapted to communicate yshooting theshut-A to brin adapted to bring motion from said slide to the saidweaving implement.

2. Apparatus for reciprocating the implements used for weaving in looms,comprising two continuously rotating friction discs, a slide adapted tobe reciprocated by said discs, and a picker on said slide, said pickerbeing adapted to communicate motion from said slide to said weavingimplement.

3. Apparatus for reciprocating the implements used 4for weaving inlooms,.a slide capable of being reciprocated across the loom, said slidebeing formed with keyways running in the direction of its motion,friction discs adapted to engage in said keyways, means for causing saidfriction discs to rotate continuously in such a direction as to drivethe slide forwards when brought into contact therewith, other frictiondiscs adapted to engage in said keyways, means for causing said secondset of friction discs to rotate continuously 'in the op osite directionto the first set, means for ringing the two sets -o'f friction discsinto driving con tact with the slide alternately, and a picker on saidslide ada ted to communicate motionpfrom said s ide to said weavingimplement.

4. Apparatus for reciprocating the implements used for weaving in looms,comprising continuously rotating friction discs, a slide adapted to bereciprocated by said discs, a picker on said slide adapted tocommunicate motion from said slide to said weaving implement, and abrake adapted the slide to rest without shock at the en of its travel.

. 5. Apparatus for reciprocating the implements used for weaving inlooms, com rising a reciprocable slide formed with eyways running in thedirection of its travel, continuously rotating friction. discs adaptedto be brought into enga ement with said keyways to throw said slieforward, other friction discs continuously rotating inthe oppositedirection and adapted to be brought into engagement with.- said keywaysto return said slide to its initial posltion, a brake the slide to restwithout shock at the end of its forward travel,- controlling means forreleasing said brake, controlling means for bringing the return frictiondiscs intoengagement with the keyways in the slide upon releaseof saidbrake, and a picker on said slide adapted to communicate motion fromsaid slide to said weaving im lement.

n testimony whereof I have signed my name to this specification.

eUsrAv FRIEDRICH GIEHLER.

lll

